The thermit reaction, such as the reaction of iron(III) oxide (Fe2O3) with aluminium, is utilized in practical applications such as joining railway tracks or repairing cracked machine parts by producing molten iron as a result of the highly exothermic reaction.
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The thermit reaction, involving the exothermic oxidation of a metal powder by a metal oxide, is widely used for metal welding in practical applications. A common example is the thermite welding of railway tracks. Iron(III) oxide (rust) reacts with aluminum powder in a controlled thermit reaction. The intense heat produced (exothermic reaction) melts the iron and aluminum, resulting in the formation of molten iron. This molten iron fills gaps between the railway tracks, creating a strong and durable weld. The thermit reaction is a reliable method for joining metals in situations where traditional welding methods may be challenging or impractical.